<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        const xhr = new XMLHttpRequest();
        xhr.open("GET", "http://localhost:3000/posts", true);
        xhr.send();
        xhr.addEventListener("readystatechange", function(event) {
            console.log(event);
        });
        // fetch("http://localhost:3000/posts") //二进制文件流
        //     .then(data => data.json())
        //     .then(data => {
        //         console.log(data);
        //     })
    </script>
</body>

</html>